Paper-developing attachment



A ril 14, 1931. K. MURCK 1,800,697

PAPER DEVELOPING ATTACHMENT Filed Jan. 25, 1929 2 Sheets-Sheet l April 14, 1931- K. MURCK 1,800,697

PAPER DEVELOP ING ATTACHMENT Filed Jan. 25, 1929 2 Sheets-Sheet 2 ing and drying,

'Patented Apr. 14, 1931 UNITED STATES KNUD MURCK, F FOREST HILLS, NEW YORK, ASSIGNOR TO cHAnLE-s BRUNING com- PANY IN 0., A CORPORATION OF NEW YORK PAPER-DEVELOPING ATTACHMENT I Application .flled January 25, 1929. Serial No. 334,898.

The object of this invention is to provide an apparatus for developing sensitized papers of the kind which do not require washbut which are developed by moistening with ,a special chemical solution, and from which positive copies are obtained by direct printing; I I

he invention relates to the art of copying originals in the manner of blue printing, but whereas the developing of blue print papers requires elaborate machinery for quantity production necessitated by the demands of modern industry, the sensitized papers referred to may be developed by very simple apparatus and require only a slight moistening of the developing solution after which they are ready for use.

ne of the objects of this invention is to provide an apparatus for developing such sensitized papers so arranged and constructed that the apparatus may be incorporated as a unit into a modern standard continuous blue printing machine whereby the industry may take advantage of the improved sensitized papers and processes without the disadvantage of having to discard costly machinery.

Accordingly the invention is embodied in an apparatus which may be quickly attached to a continuous blue printmg machine and whereby the washing and drying blue print machine units may be dispensed with. The invention therefore is of great practical utility, because not only does it permit the continued use of existing machinery, but it effects the discontinuance'of an expensive continuously flowing water supply and of continu ously oper ted heating units for drying purposes. In the accompanying drawings 7 Figure 1 is a diagrammatic illustration of a standard contilnuous blue printing machine equipped with an attachment embodying the invention and in which the washing and drying elements are omitted.

Figure 2 is a perspective view of the attachment.

Figure 3 is a detail sectional view of the I developing roller and its trough.

Figure 1 illustrates a typical continuous blue printing machine in which the original and the blue print paper is fed on a working table 5 onto an endless canvas belt 6 which runs over rollers 7 8 and 9 and presses the original and the blue print paper against a semi-circular transparent platen 10. In the focal center of the platen there is a suitable lamp 11.

'The original is exposed during its passage over the platen and the blue print is made. The original is then removed but the blue print paper, which comes from a roll, is threaded through the machine and up over a roller 12 and passes continually through the machine, originals being inserted one after the other.

In its passage through the machine and up to the roller 12, and preferably immediately before reaching the latter, the blue print paper is washed, i. e; developed, by means of a constant flow of water directed against the paper. After it passes over the roller 12, the paper is led past a battery of steam pipes and dried. The prints are then finished.

The canvas belt 6 is operated from a motor 14 by means of gears 15 and 16, and bevel gears 17 and 18. The latter drives an upright shaft 19 from which the canvas roller 9 is driven by bevel gears 20 and 21.

The roller 12 is driven by sprockets and gears which by means of chains 22, 23 and 24 transmit motion to the roller as shown and in a manner known in the art. 25 indicates a part of the general framework of the machine.

The foregoing describes the well lmown process of operating a continuous blue printmg machine. y According to this invention the ng machine is utilized for continuous printmg purposes, but the washing and drying units are either removed or rendered inoperative and therefore not shown, and into the blue printing machine structure is fitted an attachment for developing the sensitized paper by exposure to a special chemical solulon.

Referring now to Figures 2 and 3 the attachment consists. of two side frames each of which comprises a horizontal support 26, an upwardly inclined support 2 Z and an inclined leg brace 28. The supptfrt's and the blue print- Q brace are joined at a common point at 29.

- The inner ends of these members are mounted on the uprights 25 of the blue printing machine by bolts 30. The uprights are at the outsides of the machine and the several rollers, etc. are mounted therebetween.

On the horizontal supports 26 there are mounted two bearings 31, 31 in which the developing roller 32 is journaled. Between the bearings and below the developing roller there is mounted a trough 33 for containng the developing solution. On each member 26 there is further supported a depending bearing 35 and an, idler roller 36 is journaled in thebearings 35.

Each upwardly inclined member 27 supports a bearing 37 and another idler roller 38 is mounted in these bearings. The solution for developing the paper may be poured into the trough v in any convenient manner. However, I it has been found most practical to have the solution in a container 4 on a shelf 41 conveniently secured to the one side frame. A valve controlled hose 42 leads from the container to the trough 33.

The shaft 43 of the developer roller 32 is extended beyond. theone bearing 31 and on it is mounted a sprocket 44, Figure 1, which is driven by a chain 45 from another sprocket 46 conveniently driven by gearing 47 in serted in the driving mechanisms 23 of the machine so that the developer roller is driven faster than the speed. at which the paper.

passes through thefmachine.

The sensitized paper 50, fed from a roll,

not shown, and the original 51 are together" led into the machine over the working table 5 the same as with the blue print paper. After exposure the original is removed, see arrow 52, and the print paper continues through the machine over the canvas roller 9. A heavy rod or roller 53rests on the paper to keep it taut, and the paper then continues its travel over an idler 54, which is part of the blue printing machine and thence to the attachment rollers.

Here the paper passes under the roller 36, up over the developer roller 44, thence under It will be observed that the attachment is.

in knock down form, easy for shipment and installation by means of bolts and screws. The prints are much superior to blue prints because of the black lines on white background which is easier to read and permits of coloring, writing and easy changes.

I claim:

A sensitized paper developing mechanism.

of the character described comprising horizontal supporting members, a trough for containing a developing solution supported thereon, a developing roller rotatably mounted between said members and partly within the trough, inclined supporting members disposed on opposite sides of said horizontal members, guiding rollers mounted on said inclined supporting members for guiding the paper into operative relation with said de-- veloper roller, all of the aforesaid elements being assembled to form a self contained unit adapted to be attached to a sensitized paper printing machine and means for operating 9a the roller 38 to the roller 12 and out. The

the developer roller to bring out the print,

yet not become too moist. It has been found that if a developer roller of about two inches diameter is used, the paper is developed by contacting with the roller of a space of about one inch. At the same time,--it is sufficient if only enough solution is kept in the trough to keep the roller 32 moist without causing drippin Iii actual practise it has been found that the development takes place so rapidly that the paper is dry after passin over the roller 12. The machine may therefore be operated 

